Problems with New Heat Pumps
Hi there! We had a heat pump system installed in my photography studio last week and it has not performed as expected. There seem to be too many variables for me to pinpoint what the issue is but hopefully those more knowledgeable than I can help.
The space: 1400 sq ft, 35’x40′ wide open room with 10′ ceilings and an insulated concrete floor
The system: Mitusbishi Hyper Heat 28,600 BTU outdoor unit with two 15k BTU heads on opposite walls with MKH2 thermostats
The problem: This system cannot seem to keep the space above 55 or so when the temperature is at or below 15-20 degrees outside with setpoints at 70 degrees. The space will lose heat when the temperature drops and the heads are not even always running to try and gain ground. I have tried with the MKH2’s set to auto fan and manual fan and I have tried controlling from the remotes. At times the outdoor unit is not even running the fan, although I hear compressor like noises coming from it (outside of the 10 minute defrost cycles)
One other piece of information is that a couple days after install when it was clear the system was not performing properly, our contractor called his distributor and was instruction to flip a dip switch in the outdoor unit to increase the coil temperature(?) I can’t recall if that was the exact term.
I’m at a loss as to my next steps. I’m a little disappointed with my contractor as he seems to want to place blame on everything but the system, but it just doesn’t seem like it’s running as it should. I’d like to have a few ideas on how to troubleshoot it before I call my contractor back to come over.
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